[esp-r] "slab-on-grade hydronic floor" to activate concret slabs

[Hall Monika]

Dear esp-r users,
 
I use the plant component "slab-on-grade hydronic floor" to activate concret slabs. Does anybody know what the parameter " Injection node number (integer)" means? 
 
I down loaded the report from Mr Laouadi:
"Development of a radiant heating and cooling model for building energy simulation software", but I did not found what it could be.
 
It would be nice, if somebody could help me.
 
Best regards
Monika
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